* {
  margin: 0px;
  padding: 0px;
}
body, html {
    background:#edeff0;
    font: 14px/1.5 "PingFang SC","微软雅黑","Microsoft YaHei",Helvetica,"Helvetica Neue",Tahoma,Arial,sans-serif;
    min-width:1180px;
}
a {
  text-decoration: none;
}
li {
  list-style: none;
}
.page{
    text-align: center;
    margin: 100px 200px 200px 200px;
    font-size: 30px;
    overflow: hidden;
    clear: both;

}
/*头部*/
.header {
  height: 60px;
  background-color: #000;
  position: relative;
}
.header .logo {
  width: 128px;
  height: 36px;
  background: url(../img/logo.png) no-repeat center;
  background-size: cover;
  margin: 12px 25px;
  float: left;
}
.header .nav {
  float: left;
  width: 38%;
}
.header .nav__item {
  display: block;
  float: left;
  height: 60px;
  line-height: 60px;
  padding: 0px 25px;
  color: #fff;
  font-size: 14px;
}
.header .nav__item:hover {
  background-color: #363c41;
}
.header .nav__course{
   background-color: #363c41;
}
.header .nav__item_icon_new {
  /*background-color: #363c41;*/
  padding-right: 17px;
}
.header .nav__item_icon_new .icon_new {
  display: inline-block;
  position: relative;
  top: -10px;
  width: 16px;
  height: 16px;
  background-image: url("../img/icon-new.png");
}
.header .search {
  float: right;
  padding-right: 25px;
  position: relative;
  margin: 12px 25px;
  height: 36px;
  border-bottom: 1px solid rgba(120, 125, 130, 0.8);
}
.header .search_input {
  width: 240px;
  border: none;
  background-color: #000;
  height: 36px;
  line-height: 36px;
}
.header .search::before {
  content: '前端入门';
  display: block;
  width: 72px;
  position: absolute;
  left: 0;
  top: 0;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background-color: #2b333b;
  font-size: 12px;
  color: #5c646b;
}
.header .search_submit {
  display: block;
  width: 25px;
  position: absolute;
  top: 4px;
  right: 25px;
  background-position: 0 0;
  width: 22px;
  height: 22px;
  background-image: url("../img/icon-1-sprite_w22.png");
}
.header .profile {
  float: right;
}
.header .profile__item {
  float: left;
  display: block;
  width: 60px;
  height: 60px;
  margin-right: 10px;
  position: relative;
  transition: background .2s;
}
.header .profile__item:hover {
  background-color: #363c41;
}
.header .profile__car:before,
.header .profile__message:before,
.header .profile__ava:before {
  content: '';
  display: block;
  position: absolute;
  top: 19px;
  left: 19px;
  width: 22px;
  height: 22px;
  background-image: url("../img/icon-1-sprite_w22.png");
}
.header .profile__car:before {
  width: 26px;
  height: 26px;
  top: 15px;
  background-image: url("../img/shopcar.png");
  background-position: 0 -204px;
}
.header .profile__message:before {
  background-position: 0 -44px;
}
.header .profile__ava:before {
  background-image: url("../img/ava.jpg");
  width: 36px;
  height: 36px;
  top: 12px;
  left: 12px;
  background-size: 100%;
  border-radius: 50%;
}
/*课程主体*/
#main{
  min-height: 750px;
  padding-bottom: 20px;
}
#main>.wrap{
  width: 100%;
  background: #fff;
  padding-top:20px;
}
#main>.wrap>.course-content{
  width:65%;
  margin:0 auto;
  padding:0  12px;
}
/*节点筛选*/
#main>.wrap>.course-content>.course-nav-box{
  padding: 16px 0 5px;
  border-bottom: 1px solid #edf1f2;
  overflow: hidden;
}
#main>.wrap>.course-content>.course-nav-box>.hd{
  width: 60px;
  height: 30px;
  float:left;
  line-height: 35px;
  font-weight: 700;
  font-size: 16px;
  color: #07111b;
  text-align: right;
}
#main>.wrap>.course-content>.course-nav-box>.bd{
  margin-left: 64px;
}
#main .course-nav-item{
  display: inline-block;
  margin: 0 4px;
}
#main .bd .active>a{
  background: #2b333b;
  color: #fff;
  border-radius: 4px;
}
#main .course-nav-item>a{
  display: block;
  line-height: 14px;
  margin-bottom: 10px;
  padding: 10px;
  font-size: 14px;
}
#main>.container{
  width:65%;
  margin:0 auto;
}

/*课程列表*/
#main>.container>.course-list{
  padding: 35px 0 15px;
  overflow: hidden;
}
#main>.container>.course-list>.course-card-container{
  width: 220px;
  height: 228px;
  background-color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 8px 0 rgba(7,17,27,.1);
  float: left;
  margin-right: 20px;
  margin-bottom: 20px;
  border-radius: 4px;
  transition: .3s all linear;
}
#main>.container>.course-list>.course-card-container:hover{
  box-shadow: 0 6px 10px 0 rgba(7,17,27,.1);
}
#main .container .course-list .course-card-container .course-card{
  position: relative;
  z-index: 1;
  border-radius: 4px;
  overflow: hidden;
}
#main .container .course-list .course-card-bk{
  position: absolute;
  width: 224px;
  height: 228px;
  z-index: 0;
  left: 0;
  top: 0;
  border-radius: 4px;
  overflow: hidden;
  background-size: contain;
  background-repeat: no-repeat;
}
#main .container .course-list .course-card-bk img{
  border-radius: 4px;
}
#main .container .course-list .course-card-container .course-card-top{
  height: 48px;
  padding: 0 20px;
  overflow: hidden;
  background: linear-gradient(270deg,rgba(255,150,0,.7),#ff9600);
}

#main .course-card-top span{
      float: left;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    line-height: 48px;
    margin-right: 10px;
}
#main .container .course-list .course-card-content{
  height: 200px;
  background-color: #fff;
  padding: 16px 24px;
  box-sizing: border-box;
}
#main .container .course-list .course-card-content h3{
  font-size: 14px;
  color: #07111b;
  line-height: 24px;
  max-height: 48px;
  word-break: break-all;
  letter-spacing: -.1px;
}
#main .container .course-list .course-card-content p{
  font-size: 12px;
  color: #93999f;
  line-height: 24px;
  margin: 8px 0;
}
#main .container .course-list .course-card-content .course-card-bottom{
  height:35px;
  width: 100%;
  font-size: 12px;
  color:#666;
}
#main .container .course-list .course-card-content .course-card-bottom span:first-child{
    float:left;
    height:35px;
    line-height: 35px;
}
#main .container .course-list .course-card-content .course-card-bottom span:last-child{
  float:right;
  width: 34px;
  height:35px;
  background:url("../img/car1.png") 0px 7px;
}
/*尾部*/
.footer {
  min-width: 620px;
  height: 42px;
  background-color: #000;
  padding: 27px 0;
  border-top: 1px solid #e2e4e6;
  position: relative;
}
.footer .waper {
  width: 1200px;
  margin: 0 auto;
}
.footer .waper .footerWaper .followus {
  margin-right: 34px;
  padding-left: 30px;
  float: right;
}
.footer .waper .footerWaper .followus a {
  float: left;
  position: relative;
  width: 32px;
  height: 32px;
  background-image: url("../img/footer-sprite.png");
  margin: 3px 6px 0;
  opacity: 0.5;
  -webkit-transition: opacity 0.2s;
  -moz-transition: opacity 0.2s;
  transition: opacity 0.2s;
}
.footer .waper .footerWaper .followus a:hover {
  opacity: 1;
}
.footer .waper .footerWaper .followus_weixin {
  background-position: 0 -279px;
}
.footer .waper .footerWaper .followus_weixin .flw-weixin-box {
  position: absolute;
  display: none;
  width: 170px;
  height: 220px;
  left: -69px;
  bottom: 35px;
  background-image: url("../img/footer-sprite.png");
}
.footer .waper .footerWaper .followus_weixin:hover .flw-weixin-box {
  display: block;
}
.footer .waper .footerWaper .followus_weibo {
  background-position: 0 -321px;
}
.footer .waper .footerWaper .followus_qzone {
  background-position: 0 -363px;
}
.footer .waper .footerWaper .footer_intro {
  padding-left: 40px;
  float: left;
}
.footer .waper .footerWaper .footer_intro .footer_link {
  margin-bottom: 4px;
  height: 22px;
  line-height: 22px;
}
.footer .waper .footerWaper .footer_intro .footer_link ul {
  overflow: hidden;
}
.footer .waper .footerWaper .footer_intro .footer_link ul li {
  float: left;
  margin-right: 30px;
  font-size: 12px;
}
.footer .waper .footerWaper .footer_intro .footer_link ul li a {
  color: #959aa0;
}
.footer .waper .footerWaper .footer_intro .footer_link ul li a:hover {
  color: #fff;
}
.footer .waper .footerWaper .footer_intro p {
  height: 20px;
  line-height: 20px;
  font-size: 12px;
  color: #5c646b;
}
